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References

Unparalleled breadth and depth, advantages in the market

Browse our references to see the breadth of the application field of ANSYS and Tandler software, and estimate how useful simulation technology would be in your industry.

Is one of the presented challenges similar to yours? Entrust it to us – our colleagues’ experience and knowledge is at your disposal. You can’t find your company’s industry? Maybe your problem will be our next challenge – let’s try the competence of our experts and software!

We have experienced in all cases that ANSYS CFD, mechanical and complex simulation software, and Tandler piping line simulation provides you the advantages as follows below:

  • Elimination of design errors in the earliest phase and reduction of related costs
  • Faster and more efficient optimisation process with a broader level of interdisciplinary analysis
  • Reduction of time into market and faster supply of customer’s needs
  • Energy and cost efficiency in the field of construction and production
  • Reduction of operation costs, real respect of ecological rules


Building
aerodynamics

Building aerodynamics

HVAC system and
thermal comfort analyses

HVAC system and thermal comfort analyses

Building Engineering
Fire and smoke simulations

Building Engineering Fire and smoke simulations

Building Engineering
Swimming pool technology

Building Engineering Swimming pool technology


Wind comfort analysis of a football stadium

 

Stadium design is focusing on the need to create people-friendly structures by improving spectators comfort level. Closing the facades of the stadium, the draft on the spectators terrace can be lowered in the case of high winds, nevertheless, in calm wind cases, the grass needs proper ventilation to grow. This leads to an optimisation process where the architectural concepts need to be compared. In different environmental situations (wind speed and temperatures) we can assist the decision-making by simulating the temperature and airflow patterns.

  • Complex building geometry was taken into account
  • Using meteorological wind profiles
  • Modelling the forests around the stadium
  • Comparison analyses for more wind directions
  • Wind comfort investigations
  • Dead flow zones analysis in calm wind above the pitch

Wind flow analysis around a nuclear waste storage building

 

For this job, the wind flow was analysed around a nuclear waste storage building in Paks. The proper cooling of the burned out fuel cells must be secured in all meteorological circumstances. Due to the extension of an office building, the airflow characteristic around the storage building was changed. Therefore, it was necessary to verify the effectiveness of the buoyancy-driven ventilation. Using CFD simulation technologies, we made comparison analyses to demonstrate the effect of the modification.

  • Detailed building geometry was built up
  • Meteorological wind profiles were used
  • Comparison analysis were made

Bridge flutter phenomena

 

hid
hid
hid

With the increasing popularity of thin-walled structures in the field of civil engineering, the need for coupled dynamic analysis of flow and structure is also increasing. The challenge in the simulation of Fluid-Structure Interaction (FSI) is the need for the simultaneous usage of structural dynamic and fluid dynamic computation.

During this research program, the FSI methodology for aeroelastic behaviour of bridge structures is created using the ANSYS-Fluent simulation environment. The development was started with the investigation of 2 DOF systems. The results of the FSI simulations were validated by wind tunnel measurements with a section model of a bridge. The computation and measurement showed good agreement.

The coupling method used for the 2DOF models was further developed by the method of modal analysis. With the help of ANSYS Fluent and the in-house developed user defined functions (UDF), the motion of arbitrary, coupled aeroelastic bridge can be investigated. The method was tested by wind tunnel experiments as well as industrial application, has been done. Both the stability of the coupling of flow and structure and the minimisation of cell deformation is solved.

Structural- and wind engineering


Structure deformation and dynamic wind load calculations on a highway bridge

 

M8
M8
M8

The bridge that is going to be built for the M8 highway in Hungary is the biggest of its kind in the world. This places even greater emphasis on the question of expected level of wind load on the structure, where the surrounding environment has to be considered also.

The goal of this project is to determine the wind load in terms of loading forces and momentum and also to investigate the periodic flow structures that can lead to oscillations.

  • Application of Large-Eddy Simulation

The validation of the simulation was done with experimental results obtained at the Kármán Tódor wind tunnel laboratory in the Department of Fluid Mechanics BME.

  • Aluminium base structure with detailed shape
  • 1:70 scale model of the bridge section

Solar load calculations through partially shaded glass facades

 

Nowadays, in the areas of the sustainable design, efficient energy use and indoor thermal comfort are very important when retrofitting an existing facility, or when building a new one. Our job was to analyse the heat and flow characteristics in a large hall during winter, summer and under transitional working conditions. Because almost all of the façades are made of glass, we had to calculate with a high solar load. Reducing its effect, inner shading system and window film are used, where UV, visible and IR ranges were separately treated in the simulation. To minimise the HVAC-related energy costs, we took the advantages of window openings (natural ventilation cooling strategy) and we analysed in details how much heat loss occurs through doors (with air curtains) in the winter.

  • Complex heat transfer and airflow calculations in large halls
  • Solar load calculations
  • Detailed solar radiation analyses (UV, Visible and IR ranges properly treated)
  • Shadow mapping

Thermal comfort (PMV) and draft rate (DR) analyses in SkyCourt Mall

 

Designing complex HVAC and heating systems to meet comfort level requirements presents special challenges, especially in large shopping malls. In order to maintain the proper thermal (PMV) and draft (PD) conditions, the airflow needs to be properly generated by natural and forced air ventilations. During the investigations different heat sources due to guests, equipment and solar loads need to be taken into account to describe the real conditions. There can be many more factors, which can affect the airflow, and we can simulate them in one model simultaneously to provide reliable results.

  • Modelling summer and winter working conditions
  • Complex heat transfer calculations
  • Jet diffusers are controlled one by one (flow rate and direction)
  • Investigating the cold drop effects near the glass facade
  • Thermal comfort (PMV) and draft rate (DR) analyses

CFD analysis of radiant, heating-cooling ceiling panel

 

The work environment has an effect on the performance of employees; therefore, it is important to avoid uncomfortable conditions. This can be achieved in many ways by using different cooling-heating systems. To find the best solution for operation, we can compare these constructions (like underfloor- or radiant panel heating/cooling systems, etc.) for winter, summer and transitional working conditions. Determining the airflow and temperature patterns, we can compare numerically the necessary capacities and effectiveness of different systems and we can help to obtain the best option.

  • Modelling heat sources due to workers, computers, lights and solar loads
  • Modelling transient conditions
  • Detecting uncomfortable zones (thermal comfort (PMV) and draft rate(DR))
  • Airflow and draught area analyses

Fin-tube heat exchanger

 

A 3D CFD model of a Fin-tube heat exchanger has been developed with which the Thermo-hydraulic simulation of the heat exchanger and the optimisation of the design parameters can be carried out. Fin-tube heat exchangers are widely used in building engineering, and the main aim of the project was to enhance heat transfer and minimise pressure drop without increasing the production cost.


Optimisation of the ventilation system in the Hungarian State Opera House

 

opera_01
opera_02
opera_03

From a ventilation point of view, comfort depends on flow characteristics, air temperature, air humidity and radiant heat. Our colleagues investigated these factors at the Hungarian State Opera with numerical simulation using the FLUENT software. In a potential case of ventilation system reconstruction, the exact location of fresh air inlets are definable using the results.

  • Modelling the whole indoor geometry
  • Full simulation of air inlets and outlets
  • Analysis of streamline and heat distribution in cases of different scenarios

Modelling the ventilation system of the National Concert Hall in Hungary

 

szellozo_01
szellozo_02
szellozo_03

When designing the ventilation system of communal buildings with high seating capacity, it is a challenge to remove the heat produced by the audience and lighting while maintaining noise and draft free ventilation.

We have performed a numerical simulation of the flow in the concert hall of the Hungarian National Philharmonic Orchestra. We have investigated the effect of the amount of ventilated air on comfort. The goal was to determine the optimal positions of air inlets and outlets, for which one important design goal was to quickly remove the heat generated by the lighting system.

  • Detailed modelling of a several storey high spectator area
  • Simulation of the heat and natural convection produced by the audience and the lighting
  • Testing of the planned ventilation system

Optimisation of ventilation system in the Budapest Sportarena

 

bsa_01
bsa_02
bsa_03

When designing the ventilation system of communal buildings with a high seating capacity, it is a challenge to remove the heat produced by the audience while maintaining the conditions required for a sport event. For example, in a figure skating competition the air 1.5 m above the ice-rink must not exceed 18°C while in a table-tennis competition the maximum prescribed air speed must be respected.

In this investigation, the planned ventilation system of the Budapest Sportaréna has been simulated and the effect of modifications of the air inlets and controlled air inlet nozzles has been verified.

  • Detailed modelling of the complete volume
  • Verification of the draft and temperature conditions according to requirements
  • Evaluation of the planned construction changes

Optimisation of the ventilation system in a factory plant

 

uzemcsarnok

Each manufacturing facility, depending on the processes, has its own special HVAC requirements to consider. Controlling the temperature, humidity and draught parameters are vital to minimise waste production. Nevertheless, the productivity of the workers can be increased by achieving comfortable conditions.

Usually the heat loads in industrial halls generated by the equipment are high; therefore, the effects of the local natural convectional flows need to be modelled properly. Providing accurate results, airflow and temperature distributions in the facility, we can analyse how contaminants are spreading in the hall, and based on these results we can optimise the HVAC systems.

  • Simulating high heat loads
  • Analysing problems arising from draught
  • Temperature and airflow pattern analyses (comfort and technology aspects)
  • Minimising waste production

Fire and smoke propagation in a multi-storey residential house

 

Modelling of fume dispersion can lead to crucial information in high-ceilinged, complex, closed buildings. The results can support the design of ventilation and civil engineering systems with higher safety. With the simulation, it is possible to model partially open windows, heat capacity of the building and heat transfer through the walls.

  • Precise modelling of the fume components (CO, CO2, NOx, etc.)
  • Calculation of fume loading of escape routes
  • Verification of appropriate design of overpressure stairways

On the top of that, several other investigations are possible. For example, the time evolution of the fire front, computation of visibility, this can highlight whether or not the fire fighters can approach the pit after 10 minutes.


Fire and smoke propagation in the Budapest Sportarena

 

tűz
tűz
tűz

Fire protection of voluminous buildings is especially important, because of the large number of affected people. Beyond protection, the regulations specify the parameters of the building in case of a fire, such a parameter, for example, the required performance of the fume exhaust system. The rising fume must not reach the spectators area before the evacuation time, but it is equally important to consider whether or not the roof structure is weakened by the heat load. The crushing fire at the Budapest Sportarena especially turned the attention to this area.

The aim of our investigation was to determine the performance of the fume exhaust ventilation system.

  • Simultaneous application of 2D and 3D simulation models
  • Fire modelling by heat and carbon monoxide source
  • Constant separation surface velocity
  • Constant fire intensity in space and time
  • Source term increasing second order manner in time

Carbon-monoxide distribution in a naturally ventilated parking house

 

By designing parking garages, where the carbon-monoxide emission can be high due to the traffic, the air quality and ventilation are important. In this project, our job was to analyse the CO distributions in a parking garage, which was partially opened to the environment. There was no artificial ventilation system installed to change and clean the air under all working conditions, therefore, in calm wind cases, when the draught is minimal, the CO concentration could rise in some locations. During the simulation, the parking cars were modelled as heat sources, and the CO emission of cars were calculated based on the emission cadastre (KVVM 2004). The efficiency of the natural ventilation and the concentration distributions were analysed in details.

  • Multi-level parking garage simulation
  • Analysing naturally ventilated spaces
  • Carbon-monoxide spreading rate calculations
  • Using emission cadastre KVVM 2004

Disinfectant distribution in swimming pools

 

During the design process of swimming pools, the most important goal is to secure the proper water quality. Maintaining an appropriate free chlorine level is vital, because the low amount of chlorine leads to algae bloom in the pool. But the high level of free chlorine needs to be avoided as well, because it is unhealthy. Using CFD techniques, the residence time of the water can be calculated and the dead flow zones can be obtained. By optimising the pool hydraulics (location of the jet diffusers and suction points for example) the uneven temperature distributions can be minimised as well. Based on these CFD results, more comfortable and safer swimming pools can be designed.

  • Designing water features and safety analyses (waterfalls, waterspouts, etc.)
  • Investigation of complex water filtration systems
  • Sedimentation analyses in swimming pools
  • Evaporation and heat loss calculations
  • HVAC system optimisation in swimming halls (minimising energy consumption, dehumidification, condensation and comfort analyses)


Infrastructure,
environmental technology

Infrastructure, environmental technology

Energy
industry

Energy industry

Automotive
industry

Automotive industry

Heavy
industry

Heavy industry


Optimisation of biogas reactor

 

biogaz
biogaz

From non-hazardous communal waste water sludge, animal waste and agricultural residues with high organic matter, biogas can be produced in anaerobic digester tanks. We worked for the Budapest Sewage Works (FCSM Zrt.), where the aim of our optimisation was to investigate digester tanks with different geometries. Fitting to the actual work conditions, we had to achieve favourable and continuous mixing conditions in order to secure the proper biogas production. By calculating the residence time of the sludge in the digester tank, the size of the baffles, the number, the diameter, the location and the rotating speed of the mixing blades, other working parameters can be optimised. Furthermore, it is possible to investigate the size of the forming water vortex by determining the shape of the free surface in order to reach the proper foam breaking capability. In addition, we can detect the dead zones, and by avoiding them it is possible to minimise the sedimentation of the sludge; therefore, the operating efficiency of the digester tank can be increased.

  • Realistically rotated mixing blades
  • Modelling the effects of introduction of recirculated and fresh sludge
  • Optimisation of many parts, parameter sensitivity investigations

Simulation of the complete sewage system of Budapest (KANAL++)

 

eso
eso
eso

The KANAL++ is a hydraulic sewage system modelling software with a state of the art geoinformatics backend. With this program, it is possible to check the hydraulic of the system and investigate the effect of rainwater. The program helps the hydraulic system development decisions by rate of return computations.

The program can use digitised maps and aerial photographs as background images, which can improve the outline of the network. Pictures and video streams can be stored in the program which is a convenient means of illustration for the damages.

  • State of the art geoinformatics system
  • Time dependent hydraulic analysis of showers
  • Picture and video illustration for damage notes
  • Rate of return computations for system development

Ráckevei-Soroksári Danube (RSD) branch

 

The rain water from combined sewage system of the South-Pest Waste Water Treatment Plant when separated by a weir is injected into the Ráckevei-Soroksári Danube (RSD) branch. The volume flow rate of RSD is marginal; therefore, the turnover of water is slow, and with larger showers the treatment plant can be overloaded. We have investigated the feasibility of different engineering options, which are aimed to decrease the load of the Danube branch. The following possibilities are investigated:

  • Maintain of the current system;
  • Diverting part of the rainwater by using a lift station with a capacity greater than the treatment plan;
  • Increase the capacity of rainwater storage tanks and increase the capacity of the grid and sand collector. This way no untreated water is spilled into Danube.

Using the 100 year statistical data of rainwater and standardised rain intensity formulas, a 10 element model rain sequence is built. The hydraulic investigations were performed for the above mentioned cases by using the rain model. Taking these into account it was possible to predict the one year load of RSD for the different engineering constructions.


Budapest Central Waste Water Treatment Plant

 

The Budapest Central Waste Water Treatment Plant has been built as a result of the largest environmental protection investment of the past years. Our colleagues have worked on the comprehensive investigation of the hydraulic characteristics of the sewage system connected to the treatment plant. Two hydraulic models have been built consisting of 25-32 thousand pipes with which the following investigations have been done:

  • Mixed water escaping on the spillways
  • The residence time of different network sections
  • Flow velocities at different operational regimes
  • The efficiency of different operational safety improvement solutions

Exhaust gas system analysis (FSI) of an offshore oil platform

 

Exhaust flue gas is very hot and turbulent when leaving the gas turbine. By designing the exhaust gas systems on offshore oil platforms, the turbulent flow generates high-pressure fluctuations and uneven temperature distributions on the inner walls. These thermal and vibrational loads can damage the structure and decrease its life expectancy drastically. Using FSI (Fluid Structure Interaction) calculations, the flow structure and the unwanted circulations inside the chimney can be obtained. The high velocity zones can be lowered by testing geometrical modifications; therefore, the structure can be optimised from an acoustic point of view. Analysing and decreasing the size of the thermal hot spots, and avoiding the main excitation frequencies of the stack, can lead to a better designed construction.

  • FSI (Fluid Structure Interaction) calculations
  • Investigate the effect of thermal and mechanical loads
  • Analysing the pressure fluctuations by using spectral methods (FFT)
  • Calculate the spreading of hot exhaust gas in air close to a helicopter landing site

The project has been realised in cooperation with NYMO/TECHPART.


Thermo-hydraulic model of the condenser cooling system of Paks Nuclear Power Plant

 

The cooling of nuclear power plants requires high pumping power, and on top of that, the usage of surface water reserve imposes additional taxes on the operator. Our company has developed a model for the Paks Nuclear Power Plant with which the volume flow rates in the condenser cooling system can be determined along with the pressures and temperatures as a function of the environmental parameters. The simulation model was implemented in MS Excel, leading to a simple deployment without software installation, quick learning of the software operation and the possibility to use the results as input parameters for further spread sheet calculations. The model includes the dependence of the steam turbine power on the water flow rate and temperature. It also considers the change of the head, suction and electrical current curves of the pre-swirl controlled water pumps, as well as the different methods for hot water recycling. With the model, it is possible to compare the results of arbitrary number of operational states. Beyond the possibility to search for an economical optimum, the model can be used to verify possible development plans and to compare the expected results.


Modelling water boiling in a steam generator

 

atom
atom

For the prolongation of the lifetime of the Paks Nuclear Power Plant a more efficient blow-down system needs to be designed. Our colleagues developed a model for the two phase flow on the shell side of the steam-generator; this flow is of great importance in the process of removal of the corrosion products. Micro models are used for the investigation of the water circulation on the shell side:

  • 1D coupled thermo-hydraulic model of heat transfer distribution among pipes
  • 2D model for calculating the resistance of tube bundle
  • 3D model for calculating the resistance of tube supports

For the calculation of the relative motion between the steam and water phases (slip velocity), our colleagues developed a mathematical model; the preheating and boiling process was modelled by the mixture model of ANSYS Fluent using supplementary UDF (user defined function) source terms.

Additional information can be found in this flyer .


Investigation of a boiler with supplementary burner

 

ratuzeles

In a combined cycle power generation unit (gas turbine + steam turbine) the exhaust from the gas turbine contains significant amount of oxygen; therefore, it is usual to burn natural gas in the exhaust flow before the hot gas reaches the steam boilers. The uneven heat load for the heat exchanger pipes of the boiler can cause an excess heat stress, which threatens the safe operation.

This problem can already be identified and resolved at the design stage with the help of numerical simulation. With the proper design of the exhaust pipe, even flow and heat load distribution can be achieved at the burners, as well as in the boiler pipes.

  • Improve flow uniformity
  • Computation of heat load distribution

Placement optimisation of an ultrasonic flow meter sensor in electrofilter

 

ultrahang
ultrahang
ultrahang

The placement of the ultrasonic volume flow probe and particle concentration measurement probe after power plant electrofilter requires careful design, because of the requirement of representative measurement. This means that the locally measured data must match with the average of the full cross section flow data. This is especially challenging because of the significant secondary flow phenomena in the air duct after the electrofilter.

In this investigation the flow field with particle trajectories has been calculated in the air duct between the outlet of the electrofilter and the inlet of the exhaust fan. Based on the results, a proposal has been made for probe positions that fulfil the requirements of the representativeness.

  • Investigation of complex flow fields
  • Selection of points represents average values
  • Determination of the position of the measurement probe

Optimisation of engine control unit cooling

 

The cooling system of an Engine Control Unit (ECU) has to be designed carefully to prevent the electronic components from overheating. The ECU can be protected by three different cooling methods: liquid cooling, air cooling and conduction towards the car body. The aim of the project was to evaluate and compare the effectiveness of these cooling methods. The investigated parameters on the ECU temperate were the following:

  • Coolant flow rate
  • Generated heat
  • Heat sink design
  • Method of connection to the car body
  • Design of motor space
  • Stationary and moving vehicle

Optimisation of a car exhaust system

 

Kipufogórendszer
Kipufogórendszer
Kipufogórendszer

In the regulated catalytic converter of a passenger car an exothermic catalytic process takes place. The amount of excess heat strongly depends on the flow velocity. Overheating could damage the catalytic converter; therefore, for the lengthening of the lifetime of the converter, it is important to provide uniform heat load, which is in turn requires uniform flow inside the catalytic converter. The catalytic converter is built into a small volume and the computation needs to account for the curved pipes, and the anisotropic porosity of the catalytic body.

The goal of the computation was to determine the velocity and heat load distribution.

  • Direct application of CAD model
  • Anisotropic porous zone approximation
  • Compressible fluid
  • Locally transonic flow
  • Validation to the available experimental results

Optimisation of a fuel pump

 

Üzemanyag szivattyú
Üzemanyag szivattyú
Üzemanyag szivattyú

Several million side channel fuel pumps are built into passenger cars every year. The flawless operation of these components has a key importance for the car; and their electrical power consumption is significant portion of the on board electrical system. In spite of this, there is a limited amount of theoretical information about their precise behaviour. For their development it would be crucial to understand the reason of their relatively low hydraulic efficiency, and to support changes by the development of a theoretical background.

The aim of the computational simulation was to investigate the flow inside the pump and to propose changes for modifications.

  • Establish the theory of operation
  • Geometry modelling
  • Numerical simulation including cavitation
  • Validation by experiment

Flow around a brake disk

 

Féktárcsa körüli áramlás vizsgálata
Féktárcsa körüli áramlás vizsgálata
Féktárcsa körüli áramlás vizsgálata

During an assignment from the German firm Bergische Achsen Kommanditgesellschaft, the flow characteristics were analysed with the help of numerical simulation around a break disc, which the cooling is based on ventilation principles, placed in a truck wheel. The flow around the wheel is considerably affected by the flow field around the truck, which is why we have taken it into account in the analysis.

The complex inner geometry of the wheel, the wide scale of flow cross sectional dimensions and the necessary high computational demand placed a challenge for our colleagues.

  • Determination of flow characteristics around and inside the break disk
  • Determination of temperature and heat transfer coefficient distribution
  • To assure the proper boundary conditions we have taken the whole truck into account
  • Modelling of rotating wheel, rotating rim and moving ground

Waste gas removal from an iron smelting furnace

 

fust_01
fust_02
fust_03

In the process of iron smelting, a high amount of molten pig-iron is poured on a high amount of scrap iron. The process is coupled with the intense emission of harmful gases. The removal of the fume is an engineering challenge, because of the limited amount of space that can be built in. On top of that, the escape of the fume is highly transient and the load of the exhaust system significantly different from continuous loading.

Our task was to optimise the exhaust canopy, as well as the exhaustion procedure, by using laboratory experiments and numerical simulation of the flow field.

  • Validation by small scale experiments
  • Consideration of buoyancy driven natural convection
  • Quantitative characterisation of the efficiency of the fume exhausts system by considering the parameters of the machinery

Flow modelling in a metallurgic cauldron

 

metallurgia_01
metallurgia_02
metallurgia_03

During an assignment from Dunaferr Acélművek Kft., the flow characteristics were analysed by numerical simulation inside the metallurgic cauldron established by the torch created by argon gas bubbles.

In the case of realistic circumstances, the flow field of opaque, burning steel melt can only be examined with numerical simulation.

The accuracy of the calculations can only be checked indirectly with local measurements. Another challenge was the modelling of the position and the movement of aluminium-oxide inclusions which influence significantly the quality of steel.

  • Modelling of steel melt with inclusions (discrete phase)
  • Taking into account the free surface of steel and the floating clinker
  • Modelling of the melt stirring argon gas torch
  • Determination of the breakthrough area of steel through the clinker
  • Determination of the steel purification efficiency by investigating the settlement of inclusions

Optimisation of heat treatment furnace (Annealing)

 

hokezelo
hokezelo
hokezelo

Recrystallization of aluminium cylinders requires temperatures approaching the melting point of the material. In order to avoid the melting of the material surface, the heat input needs to be even and carefully controlled. This can be achieved by slow heat transfer and uniform heat distribution during the final stage of the treatment.

The goal of the investigation was to find an optimised flow pattern in the furnace by adjusting the shape of the nozzles.

  • Heat transfer computation of turbulent flow
  • Time dependent conduction and heat transfer
  • Validation of the time dependent temperature of the material by a small scale experiment


Rubber
industry

Rubber industry

Electronics
industry

Electronics industry

Chemical industry
and biotechnology

Chemical industry and biotechnology

Our own researches
and software products

Our own researches and software products


Lifetime prediction of dredge hoses

 

Coming soon…


Optimisation of outdoor LED

 

led_kulteri
led_kulteri
led_kulteri

The lifetime of the LED chip decreases exponentially as the temperature increases. High junction temperature leads to efficiency loss and changes the wavelength and colour of the emitted light, which is not allowed in many applications. Optimisation of an outdoor LED lamp was carried out and the CFD model was validated through temperature measurements on the prototype LED lamp. The goal of the project was to maximise the natural convection cooling effectiveness.

  • Cooling by natural convection
  • Calculating with radiative heat loss

Cold room in a pharmaceutical factory

 

hidegszoba
hidegszoba
hidegszoba

In this project, our job was to simulate cold rooms for a multinational pharmaceutical company. In these rooms a uniform low temperature must be maintained; therefore, the main goal of the CFD simulation was to determine the regions, where the temperature could rise above 8°C. Generally there are many heat sources in these rooms, like WFI loops (above 120°C during sterilisation), workers, warm barrels and LED lamps, which all had to be taken into account to calculate the temperature distribution properly. Modelling the heat transfer through side walls, doors, windows, etc., the appropriate layer thickness and material of the insulation can be chosen. Furthermore, the working condition of the HVAC system can be optimised, keeping the operating costs low. Based on the CFD calculations, the warm areas can be marked on the floor, where some technology process or storaging is not allowed.

  • Pharmaceutical cold room simulation
  • Complex heat transfer calculations
  • HVAC system analyses
  • Comparing flow patterns using different supply diffusers

Optimisation of oxygen supply of a fermentation device

 

fermentor

The pharmaceutical fermenter is used for promoting the growing of a bacteria culture by providing the means of injection and mixing of nutrient and oxygen. The growing process requires the injection of a sufficient amount of air without introducing a harmful level of shear stress in the mixture, which could damage the bacteria.

The aim of our investigation was to localise the oxygen depleted regions and to optimise the air intake efficiency.

  • Two phase flow
  • Simultaneously using 2D and 3D simulation models
  • Inclusion of the moving mixing blades
  • Calculation of mechanical loads

Thermo-hydraulic model of the condenser cooling system of Paks Nuclear Power Plant

 

The cooling of nuclear power plants requires high pumping power, and on top of that, the usage of surface water reserve imposes additional taxes on the operator. Our company has developed a model for the Paks Nuclear Power Plant with which the volume flow rates in the condenser cooling system can be determined along with the pressures and temperatures as a function of the environmental parameters. The simulation model was implemented in MS Excel, leading to a simple deployment without software installation, quick learning of the software operation and the possibility to use the results as input parameters for further spread sheet calculations. The model includes the dependence of the steam turbine power on the water flow rate and temperature. It also considers the change of the head, suction and electrical current curves of the pre-swirl controlled water pumps, as well as the different methods for hot water recycling. With the model, it is possible to compare the results of arbitrary number of operational states. Beyond the possibility to search for an economical optimum, the model can be used to verify possible development plans and to compare the expected results.


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